By means ofspatialencoding technique for black-white negative, positive and product positive of spectrogram an intensitypseudocolor-coded spectrogram is obtainedin awhite-light opticalprocessor.
Patients with subretinal light sensitive implants, however, perceive the shapes of objects naturally from the first day of implantation onwards without reorganisation of the spatial assignments of electrodes by an image processor and without scanning movements of the head.